What javascript errors do you get? GetZoom() and getZoom() are different things (javascript is case sensitive), your posted code uses GetZoom() which is not part of the Google Maps API v3.
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geocodezipAug 24 '12 at 20:49

I just saw it now, it was GetZoom, but need getZoom.. thanks
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Mirza DelicAug 25 '12 at 0:11